Plant for mixing the components of concrete and the like



1931- P. GRUNBERGER 1390,1413

PLANT FOR MIXING THE COMPONENTS OF CONCRETE AND THE LIKE Filed April 5, 1929 //wen for:

GRM/E Patented Jan. 27, 193 1 m srArEs- EOF'FI L'E 1 7 App1ieationffiledjApril a, 1929, Serial No.

If large amounts of concreteareto be produced, the severalmaterials forming the components of themixture are conveyed from the respective storing .rec eptacles,- for instance silos, to the mixer by means of suitable conveying devices generally separately in such aniountsi as {are required for one normal charge of theimixenthese amounts of the various ;materials being then thrown sepalO rately into the charging hopper of'the mixer and the conveying device. returning thereafter from the mixer to the storing receptacle in order-to fetch-another amount of every material. l s

This tedious procedure is improved, ac-

cording .to the presentinvention, in this way that it is rendered possible to carry out at a time a plurality. o'f-different procedures, as regards the conveyance of the several materials in certain definite amounts whereby much time is saved and the working costs are considerable reduced, I attain these objects by subdividing the conveying means, preferably also the charging hopper of themixer, into as many chambers or compartments as there are different materials required for the production of the concrete, and the sizes of said chambers or compartments are determined with consideration to the bulk of the several amounts, that is to say, with consideration to the ratio of the various materials in thefinished concrete. Furthermore, the storing receptacles, for instance the silos, are provided with discharging devices so arpartments in a. certain proper order, as is all fully described hereinafter.

The invention is illustrated diagrammatically and by way of example on the accompanying drawing on which Figure 1 is a plan of a plant designed according to this invention; Figure 2 is a similar representation showing another constructional form, Figure 3 is a view of a mixer, a charging hopper for it, and a tipping truck, and Figure 4 is a plan of the members shown in Fig. 3, all as fully described hereinafter. V

Referring to Fig. 1, A, B, and C denote three silos or, more precisely, the lower ends thereof. The silos may be arranged side by ranged as to allow of filiing the said eom-' PAUL GBU'NBEBGER, or J' sUsAem, rennsriN11,-

" rminr'ror. MIXING THE comronmirsor I corronn'rnjnnn TI-II} LIKE 352,249, mi a'Gerna 'M'a-m's, 192s.---

ag in-s B and 0101" they may spaced? likeA and B. ,Y e vdenotes a truck running irefeiabl on a track a svshowng In Fi 11 v r b the truck .6 is placed just in front of the-siloA.

.In the example shown it is assumed-that three-working proceduresare to beicarried out at a time, and the truck is,'therefore,-subdividedinto three main parts 1, 2 and 3, each the silo B, and tl 1"e .C, ient in the silO CQTh compartments A receive,fthus, the sand from the SllO A, the compartments B. receivethe gravel from the silo 13,211] d the compartments C receive the cement from the siloC. The

partition walls 7 and 7? betweenthe" three main parts o'f the truck extend preferably over the upper horizontal plane ofthe truck.

ln the constructionalform of the silosfias' T shown in F ig. 1, each thereofis alsosubdivided' into three. main parts, of which each subdivided into three chambers "a, 7) and a,"

corresponding to the subdivision of the truck I wish to indicatefthereby that; every silo" I e; used either for sand or for gravellor for cement. a

can, if desired, j

Cor-responding'to theprovision of three compartments for sandfin the truck 6, three discharge members (Z are provided at the S110 'A, andifor the same reason three dis= charge non-emberscl for gravelrare provided at the silo B, as well asthree discharge mem;-

bers (Z for cement new silo-C. The position ofthedischarge members at the silos'is different, corresponding to the ,dilferent places of the compartments A",Band C. on the truck. Therefore when the truck is moved from theieft to the right, first the three com% partments AHare filled'w ith sand; thenrthe three compartments Barejfilled with gravel finally'thethree compartments C are filled with cement it being understood that the capacity .of the; several compartments corresponds to the proper proportions ofthe maview of the]e-xplanationalready given with respect to the silo A of Fig. 1. V

The trucl'r-is preferably a tipping truck, as shown inFig. 3. The materials are thrown directly into'the' hopper jg of'the concrete mixer'l The hopper and the mixer receive the materialsdirectly from the truck (or other conveying means) in the proper prov the given cases. 5O

portions, as already stated, so that not only much time issavedbut also lesshands are needed, in: consequence whereof the manufacturing costs of the concrete are correspondingly reduced. The proper proportions of the, materials are maintained practically automatically which is useful for the uniformity'andjthequality of the product. p y Y Y Thechargin'g hopper g canv be subdivided in conformity with the subdivision of the truck, as in Fig.4, so that the several materials are separated from one another also in the hopper g and get mixed with each other only in the mixer 71.. There may be a common discharge slide for "all compartments of the hopper, or 'theremay be separate slides for the separate i onipartments, so that itis rendered possible n r'etainone orfth e other of the materials if, perhaps, a

' reason to do so should arise.

- I wish it to be understood that I do not limit myself to the arrangements and combinations of parts shown. in the drawing merely by way of example. The number of the silos. the eventual subdivision of the same, the subdivision of the truclrs as regards the number of the main .parts and the number of the compartments in every 'main part can be chosen according to the, requirement-sof conveyance ofthe materials from the truck or its eq iiivalent to the mixer, ViZQeither directly, as in Fig. 3, or indirectly by suitable intermediate means, according to the site.

Icl'airn: I v v 1. A plant for carrying, out at a time a plurality of different working, procedures,

especially mixing procedures for ;;concrete 'in1xers, compr1s1ng, 1n combinatlon, a plurality of storing receptacles,the number of which cor res ponds'to the number of the materials to be dealt with ;.a conveying member so arranged as to be adapted to be charged "successively said receptacles, and being subdivided 1n con form1ty withsaid number into main parts, each of'which is subdivided into compartments also in conformity with thenumber of the said receptacles, substantially as set forth. V

2. A plant for carrying out at atime a plurality of different working procedures,

especially mixing procedures for concrete which is subdivided into compartments also in conformity withthe number of said receptacles, substantially as set forth.

3; A plant for carrying out ata time a pluarlity of different working procedures,

especially mixing procedures for concrete mixers, comprising, incombination, a plurality of storing receptacles, the numberof which corresponds to the number of the materials to be dealt with; a tipping truck'subdivided in conformity with said number into main parts, each of which is subdivided into compartments also in conformity with the number of the saidfreceptacles; and a mixer charging hopper subdivided correspondingly so as to be adapted to co-operate with said truck, substantially as set forth.

In testimony whereof, I have signed my nametothis specification at Jerusalem, Palestine, this 14th day of March, 1929.

' PAUL GRUNBERGER.

The same is true of the. 

